Improvement in locomotive smoke-stacks



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EDWIN A. CASTELLAW, OF SAVANNAH, GEORGIA.

Letters Patent No. 113,980, dated April 25, 1871.

IMPROVEMENT IN LOCONIOTIVE SMOKE-STACKS.

The Schedule referred to in these Letters Patent and makin; part u( the lame.

To all whom lit may concern Be it known that I, EDWIN A. GASTELLAW, of Savannah, in the county of Chatham and State of Georgia, have invented a new and improved Locomotive Smoke-Stack; and I do hereby declare that the following is a full, clear, and exact description thereof,

which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing forming peut of this speeitication, in which- Figure l represents a perspective View of my improved smoke-stack.

Figure 2 is a detail section of the same, a: x, fig. 3, being the section line.

Figure 3 is ahorizontal section of the saine, y y, g. 2, being tin` section line.

Similar letters of reference indicate corresponding parts.

The invention consist-s in applying air-channels to the upper part of the stack, which will discharge a current oi' air upward close behind the smoke-stack, the said current keeping the smoke in a vertical column until the same is high enough to be clear of the train.

A in the drawing represents a smoke-stack of snitable forni and internal construction. Around its upper part, close below the upper outward-projecting liange a, are arranged air-channels b b and o c. 'ihe same are formed by vert-ical curved plates d d and r e, that areinterposed between the flange a and the cf uical top f ofthe stack.

The outer plates e e extend from the back of the smoke-stack forward to the transverse diameter of the same, while the plates d extend back from the same diameter to about thirty degrees from the longitudinal diameter :t :1o-,as is clearly indicated in tig. 3. l

The said plates d c forni thus the several air-chambers b b and c c, which are open in front to be lled' with air as the locomotive passes through the same, and to discharge it through apertures g g of the ange a back of the smoke-stack. The air thus discharged 4 through the openings a ascends in a powerful upward current and constitutes a semicylindrical vertical guard which the ascending smokecannot penetrate, and in which the same is held confined until it isV high enough to clear the train.

The number of air-chambers and apertures thus arranged on locomotive smoke-stacks may be varied at will.

Having thus described my invention7 I claim as new and desire to secure by Letters Patent- A locomotive smoke-stack provided with air-channels b b c around the rear haii' of its crown, and with apertures in the crown-dongen to constitute a guard of ascending air l'or the purpose of keeping the smoke forward, substantially as herein shown and described.

EDWIN A. CASTELLAW.

Witnesses:

J. R. HAMLET, I sAAc M. MARSH. 

